8644521376 has 48 divisors (see below), whose sum is σ = 17776886400. Its totient is φ = 4132654848.

The previous prime is 8644521311. The next prime is 8644521377. The reversal of 8644521376 is 6731254468.

It is not an unprimeable number, because it can be changed into a prime (8644521377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50365 + ... + 140803.

It is an arithmetic number, because the mean of its divisors is an integer number (370351800).

Almost surely, 2^8644521376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8644521376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8888443200).

8644521376 is an abundant number, since it is smaller than the sum of its proper divisors (9132365024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8644521376 is a wasteful number, since it uses less digits than its factorization.

8644521376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90581 (or 90573 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 8644521376 is about 92975.9182584394. The cubic root of 8644521376 is about 2052.3290108249.

The spelling of 8644521376 in words is "eight billion, six hundred forty-four million, five hundred twenty-one thousand, three hundred seventy-six".